A stator core is formed by deforming a core assembly having core pieces coupled in a strip form into an annular shape, and by joining both ends of the core assembly together to make a core-fastening portion. Individual phase windings are routed from one end of the core assembly toward another end. Lead portion (43v) of phase winding (40v) and lead portion (43w) of phase winding (40w) make up respective wire terminals. Lead portion (43u) of another phase winding (40u) is extended through a plural number of the core pieces in a direction of the lead portions (43v and 43w), and a wire terminal of the extended lead portion (43u) and the wire terminals of the other lead portions (43v and 43w) are electrically connected to provide a neutral point of three-phase Y-connection circuit.

A sheet-metal part or sintered part (10) for a stator or a rotor has a connection part (11) from which teeth (12) disposed at regular intervals project away. Each tooth has at least one first tooth segment (22) as well as at least one second tooth segment (23) produced from different magnetizable materials (M1, M2). In this way, the materials (M1, M2) can be used in targeted manner with regard to their magnetic and/or mechanical properties, in the region of the tooth (12), to optimize the magnetic and/or mechanical behavior of the tooth (12) and consequently of the sheet-metal part or sintered part (10). In particular, at least one first tooth segment (22) has a saturation magnetization BS1 greater than that of the remainder of the sheet-metal part or sintered part (10).

The invention relates to a stator (8) for an electromagnetic motor or generator comprising windings (4) and a magnetic circuit, the stator (8) comprising a yoke with a circular or polygonal shape and winding support teeth (3). Each winding (4) rests on a tooth (3) while at least partly surrounding a winding support (13, 14), each winding support (13, 14) comprising or being associated with snap snap-fitting means (15′) that cooperate with complementary snap-fitting means (3′) supported by a tooth (3) associated with the winding support (13, 14) so that the winding support (13, 14) is fastened to the associated tooth (3).

A manufacturing method of a laminated core includes forming a first blanking member by blanking a band-shaped metal plate along a predetermined first blanking shape and forming a second blanking member by blanking the metal plate along a predetermined second blanking shape. The first blanking shape has a first-yoke corresponding region corresponding to a first yoke portion and a plurality of first-teeth corresponding regions corresponding to a plurality of first teeth portions. The second blanking shape has a second-yoke corresponding region corresponding to a second yoke portion and a plurality of second-teeth corresponding regions corresponding to a plurality of second teeth portions. The plurality of second-teeth corresponding regions are located between the plurality of first-teeth corresponding regions in a width direction one by one. The second teeth-corresponding region is located closer to one first-teeth corresponding region than a virtual straight line.

A straight line lamination for an electric motor has alternating finger segments and hinge segments to be rollable after windings are installed to form a circular motor stator. The lamination is configured such that inner edges of a back iron region are non-arcuate in shape to provide extra back iron material near the hinge segments for mitigating torque constant roll off.

A method for producing a rotor for a reluctance machine, in particular for a synchronous reluctance machine, and a rotor produced by the method, are provided. The laminated rotor core is produced by punching and stacking two or more adjacent laminations of the core. The adjacent laminations are held together by at least one connection point created during the punch stacking, the at least one connection point simultaneously forming a flux barrier of the rotor. The rotor comprises a laminated core, which is stacked from at least two lamination sheets, with the at least two adjacent lamination cuts being connected to each other by at least one connection point forming at least one flux barrier of the rotor.

A stator including a stator core formed in a ring shape is manufactured as follows; previously preparing an original core body provided with a belt-shaped part in a straight line shape structured of multiple outer peripheral parts and multiple salient pole parts, forming a recessed part on each of outer side faces of first outer peripheral parts disposed on both end sides of the belt-shaped part at a position between the salient pole part connected with the first outer peripheral part and an end part in the longitudinal direction of the belt-shaped part; and a bending step in which the original core body is successively pressed and bent from a center of the belt-shaped part toward both end sides.

A motor stator and a method for forming the motor stator are provided. The method includes the steps of: providing a plurality of plates or metal powder, forming the plate or the metal powder into a plurality of magnetic laminations, wherein each magnetic lamination comprises a yoke portion and a plurality of stator teeth, each of the stator teeth comprises a tooth portion and two pole shoes, and one end of one of the pole shoes extends towards the direction away from the yoke portion to form a bent portion; axially overlapping the plurality of magnetic laminations and fixing the magnetic laminations to form a stator core; winding wires to the stator core; and bending the bent portions towards adjacent stator teeth, to form a smooth transition connection between the bent portions and the pole shoes connected thereto. The method makes the winding convenient and fast.

An electric motor includes an inner rotor unit including a rotary body having an outer ring portion and multiple magnetic members mounted to the outer ring portion, and a stator unit including multiple alternately arranged first and second stators. Each first stator includes a first magnetic conductive member and a first coil. Each second stator includes a second magnetic conductive member disposed between two adjacent first stators, and a second coil . An imaginary circle is defined to be centered at a central point of the rotary body and to pass through central points of the first coils. The second coil of each of the second stators has a central point that does not lie on the imaginary circle.

There is provided a motor armature structure including an armature that includes: a winding body; an armature core having a plurality of winding cores; and a structure framework, at least a part of the structure framework includes an insulating member, and the armature core includes a molded magnetic material admixture.